June 17, 2022 Russia-Ukraine news

US President Joe Biden said Friday he has been briefed on the three Americans missing in Ukraine and strongly encouraged Americans not to travel there. 

Some background: The men are Alexander John-Robert Drueke, 39, from Tuscaloosa, Alabama and Andy Tai Ngoc Huynh, 27, from Hartselle, Alabama.

In addition, the US State Department said Thursday that it was aware of reports that a third American who traveled to Ukraine to fight against Russia had gone missing "in recent weeks."

"There are reports of one additional American whose whereabouts are unknown. I can't speak to the specifics of that case. Unfortunately we don't know the full details of that case," said State Department spokesperson Ned Price at a news briefing on Thursday.

Drueke and Huynh went missing during a battle on June 9 near the town of Izbytske, according to a man who is acting as the team's sergeant, and who provided CNN with photos of both men's passports and their entry stamps into Ukraine. He wished to remain anonymous for security reasons.

CNN's Mick Krever contributed reporting to this post.

Russian President Vladimir Putin on Friday urged Russian elites to not leave the country and invest in Russia. 

In one of the first more substantial speeches since the invasion of Ukraine started, he said, Russia "has a huge potential and there's so much to do here, there is no end to it. Invest here."

This comes after Russian oligarchs face mounting sanctions and superyacht seizures from several western countries, including the US, UK and the European Union bloc.

British Prime Minister Boris Johnson traveled to the Ukrainian capital of Kyiv on Friday to visit President Volodymyr Zelensky for a second time, according to Ukraine's Presidency. 

Video from the Presidency showed Zelensky warmly greeting Johnson before both men stepped inside a presidential building for a meeting. The two leaders were shown sitting at a table discussing Ukraine's need for heavy weapons to counter Russia's continuing aggression.

Zelensky said on Telegram:

Johnson posted a picture of him and Zelensky in the Ukrainian capital on Friday on his official Twitter account.

 Zelensky met yesterday with French President Emmanuel Macron, German Chancellor Olaf Scholz, Italian Prime Minister Mario Draghi and Romanian President Klaus Iohannis in Kyiv.

Russian President Vladimir Putin said that Russia's actions in Ukraine are not responsible for the global food crisis and accused the US of driving up food prices in his speech to the St. Petersburg International Economic Forum on Friday. 

"Famine in the poorest countries will be on the conscience of the US administration and the Eurocrats," he said.  

Putin said Russia is ready to export more grain to balance the world food markets. Russia’s focus will be on supplying food to those countries that are at risk of facing famine, he said.

Some key context: Global leaders have strongly criticized Putin's actions in Ukraine, saying that Russia is using food as a weapon of war.

Russia is blocking maritime access to the Black Sea ports held by Ukraine, meaning that even the grain that is still under Ukrainian control cannot be exported to the many countries that rely on it. Russia’s blockade has already raised global food prices and threatens to cause a catastrophic food shortage in parts of the world, according to the United Nations.

Ukrainian authorities, and some international officials, have accused Russia of robbing the country of grain and other commodities in areas it occupies. Denys Marchuk, deputy chairman of the Ukrainian Agrarian Council Public Union, said that Russia has “stolen about 600,000 tons of grain” from Ukrainian farmers.

Satellite photos of the Crimean port of Sevastopol provided by Maxar Technologies last month appeared to show Russian ships being loaded up with Ukrainian grain. Another set of satellite images revealed that one of the ships arrived in the Syrian port of Latakia last month, its second trip within four weeks.

Meanwhile: In his Friday speech, Putin also again blamed the West for “shifting the responsibility” to Russia for any problems in the global economy.  

Putin also said that Russia is not following the "path of isolation," adding that Moscow seeks "partnerships with anyone who wants to work with us, and there are many of those." 

The Russian leader said that any country who wants to work with Russia "experiences open pressure from the US and Europe including direct threats, but this blackmail means little when we talk about countries led by true leaders who understand what is someone else's interest and what is their interest." 

CNN's Ivana Kottasová contributed reporting to this post.

Russian President Vladimir Putin vowed to accomplish all the alleged "tasks" of Moscow's military action in Ukraine while speaking at an economic forum in St. Petersburg on Friday.

He called Russia's "special operation" in Ukraine "the decision of a sovereign country based on the right to defend its security." He vowed "all the tasks of the special operation will be met."

The Russian leader claimed that Russia was "forced" to conduct its "operation" in the eastern Donbas region. 

"It was difficult, but forced and necessary. And it was based on the UN charter to defend our security," Putin added.

Russian forces failed to take the Ukrainian capital of Kyiv and other areas of Ukraine in the earlier weeks of the war and have since been focused on the eastern part of the country.

Some context: The Russian president has long framed his decision to launch an invasion of Ukraine as a response to Kyiv’s growing diplomatic and security ties with the West. Last week, he hinted that his aim in Ukraine is the restoration of Russia as an imperial power.

Another one of Putin's alleged goals in his invasion, which began in late February, includes a baseless battle for “denazification,” a description dismissed by historians and political observers alike.

In his Friday speech, Putin also called the attempts of the West to "crush" the Russian economy through punishing sanctions "not successful."

"The economic dynamics are stabilizing; the state finances are stable," he added. 

The Russian president also said “the era of the unipolar world is over,” referencing the United States, and stated that the European Union has "fully lost its political sovereignty."  

Russian President Vladimir Putin has taken the stage at the International Economic Forum in St. Petersburg and is now speaking.

The speech was supposed to start at 7 a.m. ET, but was delayed due to a “massive DDoS [distributed denial-of-service] attacks" on the SPIEF systems, the Kremlin said Friday.

Ukraine’s cabinet has decided to get rid of visa-free travel for Russians, Prime Minister Denys Shmyhal has confirmed.

President Volodymyr Zelensky said on Telegram that he suggested the change “in order to counteract the unprecedented threats to the national security, sovereignty, and territorial integrity of our state.”

He said that the change would come into effect on July 1.

Negotiations are underway to allow for the safe evacuation of hundreds of civilians sheltering at a chemical plant in Severodonetsk, the head of the district’s military administration told Ukrainian television.

Russia earlier this week said that it would open a “humanitarian corridor” for civilians at the plant to evacuate, but only to Russian-controlled territory to the north, not to Ukraianian-held Lysychansk to the west.

Serhiy Hayday, head of the regional military administration, told CNN on Thursday that an evacuation would be possible only if there were a complete ceasefire, but that he was highly skeptical of any promises made by Russia. 

Vlasenko said that the situation at the Azot plant was “tense.”

At repeated points during the war, Ukrainian officials say, Russian forces have broken promises to open evacuation corridors, driven civilian evacuees onto their territory and failed to observe ceasefire agreements.

Diplomatic efforts to bring Ukraine closer to the West continue, while Moscow says it knows nothing about two US citizens who went missing fighting alongside Ukrainian forces.

Here are the latest developments in Russia's invasion of Ukraine:

Ukraine-EU process moves forward: Ukraine's bid to join the European Union received a major boost on Friday morning, after the bloc's executive said it believed the country should be formally considered for candidate status in the wake of Russia's invasion.

NATO builds Ukraine ties: Ukraine’s defense minister on Friday morning said NATO allies told him at a summit in Brussels that his country was considered a “de facto” member of the alliance. 

Moscow denies any knowledge of missing US fighters: Kremlin spokesperson Dmitry Peskov told CNN on Friday that he does not know anything about two American fighters who went missing north of Kharkiv, Ukraine.

Third US fighter missing: A third American whom the State Department has identified as missing in action in Ukraine is a US Marine veteran, Grady Kurpasi, his wife confirmed to CNN.

More than 1,300 civilians killed in Mariupol: The UN said 70 children were among at least 1,348 civilians killed during the battle of Mariupol. “The actual death toll of hostilities on civilians is likely thousands higher,” UN High Commissioner for Human Rights Michelle Bachelet said Thursday.